Here's what swapping to a 2-into-1 exhaust can do for Harley-Davidson performance

2-into-1 exhaust kits attach to your cylinders to make your exhaust exit a single tube. But this type of exhaust isn't just used for style or sound.
Detroit Free Press

Motorcycles roar: Turn down the noise, critics say

When Ken Gimpert revs the engine of his Harley-Davidson motorcycle, it's hard to ignore the roar.. That's just what the biker from Grosse Pointe Farms wants. “It lets people hear you,” Gimpert ...
autoevolution

Harley-Davidson Silver Streak Is How You Call a Custom Sportster with One Exhaust Pipe

Not long ago, American bike maker Harley-Davidson reinvented its offering in a segment it likes to call sport with the release of the new Sportster and later the accompanying Nightster. Both these ...
Business Insider

Heat-reactive paint used on Harley Davidson exhaust pipes

An curved arrow pointing right. THERMO-X is an Australian company which makes heat-reactive paint. In this video, the paint is applied to the exhaust pipes of a Harley Davidson. When the engine is ...